Which of the following statementbw+8 f9dht6fx se l-z;s about the effect of surface area and volume on the cell’s processes is fals-s; de8h9xzlw+6f ftbe?

  Which statement best describ*tn +0t oia+77 7s) 8ccetq1eikxu s) crui-cses stem cells?

  Which is a correct descriptiolv+5 l+pkn( x0,a yhdnn of the cell type adapted for gas exchange in the lhp yx0l+lad,n5v k (n+ungs?

  Which of the following explains the limi 2q.f/b;xhk rdu/ f)/ub o(3mbwrciq8tations on cell size?

  What is this cell's most likely primary function, aulg:syy,e u 5wn20ip4ha7bi.nd where could it be located in a mammal? . 2hu i:islwye7,uany b5g40p

  Which of the following characteristics of type I pneumocytes contribute to incwblpa.:8o0 vareasing the rate of gol8bp w aa0:v.as exchange?
I.
Cells are flattened
II.
Secretion of a surfactant
III.
Cover less than 10% of the alveolar surface

  A patient receives a bone3zxoxf3m4/)a xaf-s ,ihx p9b marrow transplant from a 36 year old. One of the functions of these cells is to produce red and white blood cells. What type of stem cells has the patient rece3if ha-9)m4 f3axpb xx,/xszoived?

  Based on the Venn diagram, which identif kju8x xaf q1:61qsj)nies cardiac muscle cells and striated muscle fibrxu )qs11 jj8 k6fx:aqnes?

Below is a diagram of a motor neurps86pb er +lu6on. Neurons are the longest cells in the human e+6u8sprbpl 6body.
1.Explain the factors that limit cell size in humans.
2.Explain how life functions are performed by Paramecium.

Premature babies sometimes suffer from infant respira, 1dry3pu0j 35ccseaf nuy3(m tory distress syndrome, which could be caused by a lack of sufficient surfactant in the pulmocrd m3ej ua n3(c,3fuy01 psy5nary alveoli. The diagram below shows two different alveoli structures.


1.Describe one feature of the surfactant.

2.Suggest a treatment for infant respiratory distress syndrome.

3.Draw a labelled diagram of the structures in an alveolus that are important for gas exchange.

  Which of the following is a reason that embryonic 0w(alb j4kzs):j-vwh ,a qd)pstem cells are not used in the treatment of leukaems(jq -dw),pabjk:hlzva0)w 4 ia?

  The table shows the diameters of red blood cells from differenka 2bu rzx-8v23te0q b;j )unqt organisms. Which red blood cell will have the highest surface areak2ena vr-8uu3q)t0zb2 ;xq jb to volume ratio?

1.Explain how the shape of erythrocytes and cells lining the proximal cwzv i dx2joz3l,:5yqm xmx(1- onvolutedloijym-(xv:x23zz wx5dm q 1, tubule make these cells more adapted to the functions they perform.

2.Compare and contrast the structure of striated muscle cells and cardiac muscle fibres.

3.Explain how the structure of egg and sperm cells are adapted to their functions.

  Which statements about embryon;uv6qgyn (xaq7e zsrazp,: ( .ic stem cells and specialised cells is/are not true?g6vr q;yzxqa(a.p e, zun(s7:

I. Embryonic stem cells have higher levels of DNA methylation than differentiated cells
II. Specialised cells are more differentiated than embryonic stem cells
III. Most specialised cells and embryonic stem cells both contain the entire genome of an organism

  In humans, which of the following is z,u1*ted .n hc.ed z /z5pm;x91yvg wq)j+jdcthe correct order from smallest to largest? dpv1w.;zujch5/.zctm*jyznq +e1 d, x) deg9

  Which row in the following tag+j : .liwop:lble gives the correct disadvantages of the different stem cell so+ .:giw :ljlopurces for therapeutic uses?

1.Describe how the use of stem cells may be us.xyjbjf3n 3g(ed to treat type I diabetes in the future. jbyg( xn3j. f3

2.Explain the factors that limit cell size in humans.

3.Explain how red blood cells and striated muscle fibres are adapted to their function.

Below are diagrams of specav)7bm qv. k6qialised cells (not to scale).

1.Put these cells in order of size, from the smallest to the largest.

2.Compare and contrast totipotent, pluripotent and multipotent stem cells.